Influence of rise time on dielectric parameters extracted from time domain spectroscopy in the context of generator stator insulation

Author

David, Eric ; Lamarre, Laurent

Author_Institution

Ecole de technol. superieure, Montreal, Que., Canada

Volume

12

Issue

3

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

423

Lastpage

428

Abstract

The low-frequency dielectric response of generator stator winding insulation materials was calculated from high voltage time domain spectroscopy measurements. These results were used to calculate the theoretical response after the application of a voltage function consisting of a ramped voltage followed by a constant level voltage. The rate of rise of the ramped portion of the voltage function was shown to influence the well known and much used polarization index (PI) and insulation resistance (IR) parameters.

Keywords

ageing; dielectric polarisation; electric generators; electric resistance; machine insulation; spectroscopy; stators; aging; dielectric parameters; dielectric response; generator winding insulation; insulation materials; insulation resistance; polarization index; ramp voltage; stator winding insulation; time domain spectroscopy; Dielectric materials; Dielectric measurements; Dielectrics and electrical insulation; Electrochemical impedance spectroscopy; Oil insulation; Polarization; Pollution measurement; Stators; Time measurement; Voltage;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2005.1453446

Filename

1453446